Add static getters for common internet addresses

runtime/bin/socket.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef BIN_SOCKET_H_
 #define BIN_SOCKET_H_
 
 #include "bin/builtin.h"
 #include "bin/utils.h"
 
@@ skipping 24 matching lines @@
 };
 
 class SocketAddress {
  public:
   enum {
     TYPE_ANY = -1,
     TYPE_IPV4,
     TYPE_IPV6,
   };
 
+  enum {
+    ADDRESS_LOOPBACK_IP_V4,
+    ADDRESS_LOOPBACK_IP_V6,
+    ADDRESS_ANY_IP_V4,
+    ADDRESS_ANY_IP_V6,
+    ADDRESS_FIRST = ADDRESS_LOOPBACK_IP_V4,
+    ADDRESS_LAST = ADDRESS_ANY_IP_V6,
+  };
+
   explicit SocketAddress(struct addrinfo* addrinfo);
 
   int GetType() {
     if (addr_.ss.ss_family == AF_INET6) return TYPE_IPV6;
     return TYPE_IPV4;
   }
 
   const char* as_string() const { return as_string_; }
   const RawAddr& addr() const { return addr_; }
 
@@ skipping 115 matching lines @@
                                    intptr_t backlog);
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(ServerSocket);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_SOCKET_H_